Key Recorder can record your keystrokes and mouse input and show you the statistics. You can view a chart with the most common key presses.
Download the latest release from the Releases page. Then, open a terminal at the directory of the
downloaded file and type:
java -jar {jar-file}
where {jar-file}
is the jar file you downloaded.
Also you can download it from Sourceforge with the button below.
The chart shows you the most common key presses in your desired order.